linux-kernel - Re: [CRED bug?] 2.6.29-rc3 don't survive on stress workload

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Date:	Wed, 11 Feb 2009 18:19:23 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	David Howells <dhowells@...hat.com>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Serge Hallyn <serue@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>
Subject: Re: [CRED bug?] 2.6.29-rc3 don't survive on stress workload


* David Howells <dhowells@...hat.com> wrote:

> Ingo Molnar <mingo@...e.hu> wrote:
> 
> > include/linux/cred.h: In function 'get_cred':
> > include/linux/cred.h:188: warning: passing argument 1 of 'get_new_cred' discards 
> > qualifiers from pointer target type
> 
> This is a known compiler bug in some versions of gcc.  It fails to observe the
> fact that a const pointer is cast to the equivalent non-const pointer in
> get_cred():
> 
> 	static inline const struct cred *get_cred(const struct cred *cred)
> 	{
> 		return get_new_cred((struct cred *) cred);
> 	}

If by 'some versions of gcc' you mean 'gcc 4.2.2' then yes. And in any case
it's a very annoying warning.

	Ingo
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